| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 54m 14.73274s[1] |
| Declination | +30° 34′ 44.8283″[1] |
| Apparent magnitude (V) | +5.40[2] (6.09 + 6.37)[3] |
| Characteristics | |
| Spectral type | G7 III + K0 III[4] |
| B−V color index | 1.05[2] |
| Astrometry | |
| Radial velocity (Rv) | −59.2±0.4[2] km/s |
| Proper motion (μ) | RA: +41.60[1] mas/yr Dec.: −24.02[1] mas/yr |
| Parallax (π) | 7.07 ± 0.68 mas[1] |
| Distance | 460 ± 40 ly (140 ± 10 pc) |
| Absolute magnitude (MV) | –0.33[2] |
| Details[5] | |
| 57 Cnc A | |
| Mass | 6.49±2.16 M☉ |
| Luminosity | 173.13[2] L☉ |
| Surface gravity (log g) | 2.74±0.11 cgs |
| Temperature | 4,810±92 K |
| Metallicity [Fe/H] | 0.08±0.05 dex |
| Age | 645+154 −120 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
57 Cancri is a double star in the zodiac constellation of Cancer, located around 460 light years away from the Sun.[1] They are visible to the naked eye as a faint star with a combined apparent visual magnitude of +5.40.[2] The brighter member, designated component A. is a yellow-hued giant star with a stellar classification of G7 III[4] and an apparent magnitude of +6.09.[3] Its companion, component B, is an orange-hued giant with a class of K0 III[4] and an apparent magnitude of +6.37.[3] As of 2017, the pair had an angular separation of 1.50″ along a position angle of 310°.[3]
vanLeeuwen2007 was invoked but never defined (see the help page).Anderson2012 was invoked but never defined (see the help page).WDSC2014 was invoked but never defined (see the help page).Abt2008 was invoked but never defined (see the help page).Feuillet2016 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).